Errata List for End-of-Chapter Questions in the
International Edition of Computer Networking, 5 th
Edition, by Kurose/Ross
Chapter 1
P1
Refers to Figure 1.8; this should be Figure 1.12.
P9
“In the above problem” should refer to problem P12.
Comments: Otherwise, the problem description is inconsistent so there is no solution.
P13.
Parts a) and b) should be switched.
P17
Refers to Figure 1.16(b); this should be Figure 1.20(b).
P18
Refers to problem P17; this should be P23.
Comments: Otherwise, this problem has no solution as P17 does not give any distance, which is required for finding delay.
P19
Refers to problem P17; this should be P23.
P21
Refers to problem P17; this should be P23.
P22
Parts a) and b) should be switched because of the dependency.
P24

Parts b) and c) should be switched, and Figure 1.28 should feature a packet symbol at each of the
4 points in the line, as shown below.
Chapter 2
P12
Part a). There is an editing mistake. The £ sign should be changed to ≤
Part c). “ ≥ ” is missing between u_s/N^3 and d_min.
Also b) and c) should be switched, because b) actually depends on c).
P15
Part b). The full problem description should be as follows:
Suppose you have configured your POP mail client to operate in the download-and-delete mode.
Complete the following transaction:
C: list
S: 1 498
S: 2 912
S: .
C: retr 1
S: blah blah ...
S: ……….blah
S: .

?
?
Chapter 3
R14
Part f). “ ≥ sec” should be “ ≥ 1 sec”.
P33
Refers to Figure 3.55; this should be 3.56 in both instances.
P39
Part b). “s/R + RTT > 4 S/R” should be “8 S/R > s/R + RTT > 4 S/R”.
Chapter 4
P27
Ignore part c), as s is not in the figure.
P30
The image of the network is missing. It is pictured below.

P33
“eight-node” should be “seven-node”; “s to z” should be “t to z”; “at s that” should be “at z that”
Comments: There is no s in the referenced figure.
P35
Refers to Figure 4.45; this should be 4.44 in both instances.
P37
Refers to Figure 4.47; this should be 4.46.
Chapter 5
P6
Part a): “N 10” should be “N=10”
Part b). “N 25” should be “N=25”
Part c). “N 50” should be “N=50”
P11
Part b). “found in (b)” should be “found in (c)”.
Alternatively, “found in (b)” can be “that maximizes the efficiency for fixed N”. In that case, remove c), as c) is now contained in b).
Comments: Parts b) and c) are swapped, which causes problems. Part b) refers to itself
(“using … found in (b), …”.), and solving b) actually depends on the solution of c).
P24
Refers to Figure 5.37; this should be Figure 5.36.
Chapter 6
P16
Refers to Figure 6.21; this should be Figure 6.22.
Refers to Figure 6.22; this should be Figure 6.23.

Chapter 8
P5
Refers to Figure 8.21; this should be Figure 8.19.
P10
Refers to Figure 8.24; this should be Figure 8.22.